A ring main unit with explosion-proof function

Abstract

The utility model belongs to the technical field of ring main unit, disclose a kind of ring main unit with anti-explosion function, including ring main unit main body, the side of ring main unit main body is equipped with machine case, the inside of machine case is equipped with several air inlets in the side close to ring main unit main body, and the one end of air inlet extends to the inside of ring main unit main body, the top of the inside of machine case is equipped with air pump by support, the input of air pump is connected with several air inlets by connecting pipeline, the output of air pump extends to the outside of machine case, and the edge of the side close to ring main unit main body of machine case is equipped with a pair of opening. The device moves through sealing plate, when ring main unit main body is on fire, close ventilation opening, reduce air entering, make ring main unit main body and outside isolation, and discharge the air in the inside of ring main unit main body by air pump, reduce the oxygen content in the inside of ring main unit main body, to improve the security of ring main unit, reduce the probability of causing further loss.

Description

Technical Field

[0001] This utility model belongs to the field of ring main unit technology, and more specifically, it relates to a ring main unit with explosion-proof function. Background Technology

[0002] A ring main unit (RNB) is an electrical device used in power distribution systems, primarily in medium- and low-voltage ring network power supply networks in urban and industrial power systems. Its main function is to distribute electrical energy and ensure a reliable power supply, while also providing automation, protection, and switching functions.

[0003] When ring main units encounter high temperatures, overloads, or short circuits during operation, the internal electrical equipment is prone to explosion and fire. In some enclosed environments or high-risk locations, fires and explosions of ring main units can easily lead to greater safety hazards.

[0004] Therefore, in view of this, we will study and improve the existing structure and its shortcomings, and provide a ring main unit with explosion-proof function in order to achieve a more practical value. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a ring main unit with explosion-proof function, which is achieved by the following specific technical means:

[0006] An explosion-proof ring main unit includes a main body, a chassis mounted on one side of the main body, and several air inlets installed inside the chassis near the main body, with one end of each air inlet extending into the interior of the main body. An air pump is mounted on the top of the chassis via a bracket, the input end of which is connected to the air inlets via a connecting pipe, and the output end of which extends to the outside of the chassis. The chassis has a pair of openings on its edge near the main body, penetrating the main body. The main body of the ring main unit has a pair of sealing plates that match the size of the opening, which are slidably installed on both sides of the inside of the chassis at a position parallel to the opening. The pair of sealing plates are respectively in close contact with the two sides of the main body of the ring main unit. A drive assembly is installed at the bottom of the inside of the chassis. Several temperature sensors are installed inside the chassis on the side near the main body of the ring main unit. Several ventilation openings are provided on the side of the main body of the ring main unit near the pair of sealing plates. Several installation chambers and electrical racks are provided inside the main body of the ring main unit. A cable inlet hole is provided on one side of the bottom of the main body of the ring main unit.

[0007] Furthermore, the drive assembly includes a threaded rod, which is rotatably mounted at the bottom end inside the chassis via a bearing seat. A connecting plate is threadedly connected to the circumference of the threaded rod, and the connecting plate is respectively connected to a pair of sealing plates.

[0008] Furthermore, a motor is installed on one side of the bottom of the chassis, and the output end of the motor is connected to the threaded rod via a coupling.

[0009] Furthermore, a fire extinguishing mechanism is installed at the top of the main body of the ring main unit.

[0010] Furthermore, several observation windows are installed on one side of the main body of the ring main unit.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The explosion-proof ring main unit of this utility model, through the coordinated use of the main body, chassis, air inlet, air pump, opening, sealing plate, temperature sensor, ventilation opening, installation chamber, electrical rack, cable inlet, threaded rod, connecting plate, motor, fire extinguishing mechanism, and observation window, facilitates the sealing plate movement to close the ventilation opening when the main body of the ring main unit catches fire, reducing air entry and isolating the main body of the ring main unit from the outside world. The air pump then expels air from inside the main body of the ring main unit, reducing the oxygen content inside, thereby improving the safety of the ring main unit and reducing the probability of further damage. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0014] Figure 2 This is a three-dimensional sectional view of the main body and internal structure of the ring main unit of this utility model.

[0015] Figure 3 This is a three-dimensional sectional view of the main body and internal structure of the ring main unit of this utility model.

[0016] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0017] 1. Ring main unit; 2. Chassis; 3. Air inlet; 4. Air pump; 5. Opening; 6. Sealing plate; 7. Temperature sensor; 8. Ventilation opening; 9. Installation chamber; 10. Electrical rack; 11. Cable inlet; 12. Threaded rod; 13. Connecting plate; 14. Motor; 15. Fire extinguishing mechanism; 16. Observation window. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0019] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0021] As attached Figure 1 To be continued Figure 3 As shown:

[0022] This utility model provides a ring main unit with explosion-proof function, including a ring main unit body 1, a chassis 2 installed on one side of the ring main unit body 1, and several air inlets 3 installed inside the chassis 2 on the side near the ring main unit body 1, with one end of the air inlets 3 extending into the interior of the ring main unit body 1. The specific position of the air inlets 3 is determined according to the installation position of the electrical components inside the ring main unit to avoid obstructing the installation of the electrical components. An air pump 4 is installed on the top of the interior of the chassis 2 through a bracket. The input end of the air pump 4 is connected to the several air inlets 3 through a connecting pipe, and the output end of the air pump 4 extends to the outside of the chassis 2. The air pump 4 and the air inlets 3 can improve the air circulation inside the ring main unit body 1 and reduce heat accumulation during normal use. The chassis 2 has a pair of openings 5 ​​on the edge near the side of the ring main unit body 1, and the openings 5 ​​penetrate the side of the ring main unit body 1 near the chassis 2. A pair of openings of the same size as the openings 5 ​​are slidably installed on both sides of the interior of the chassis 2 at a position parallel to the openings 5. Matching sealing plates 6 are provided, and a pair of sealing plates 6 are respectively attached to both sides of the main body 1 of the ring main unit. The sealing plates 6 are made of metal plates with sealing gaskets (such as high-temperature resistant rubber gaskets) on the surface. In the event of a fire, the side with the sealing gasket is attached to the side of the main body 1 of the ring main unit with ventilation openings 8. A drive assembly is installed at the bottom of the internal enclosure 2 to drive the sealing plates 6 to move. Several temperature sensors 7 are installed inside the enclosure 2 on the side near the main body 1 of the ring main unit. The temperature sensors 7 monitor the temperature at different locations of the main body 1 of the ring main unit in real time. Several ventilation openings 8 are provided on the side of the main body 1 of the ring main unit near the pair of sealing plates 6 to improve the air circulation of the main body 1 of the ring main unit during normal use. Several installation chambers 9 and electrical racks 10 are provided inside the main body 1 of the ring main unit. The position and size of the installation chambers 9 and electrical racks 10 are determined according to the actual installation requirements of electrical components. A cable inlet hole 11 is provided on one side of the bottom of the main body 1 of the ring main unit. A gasket with sealing material can be added to the cable inlet hole 11 to ensure sealing.

[0023] The drive assembly includes a threaded rod 12, which is rotatably mounted at the bottom of the housing 2 via a bearing seat. A connecting plate 13 is threadedly connected to the periphery of the threaded rod 12, and the connecting plate 13 is connected to a pair of sealing plates 6 respectively.

[0024] Among them, a motor 14 is installed on one side of the bottom of the internal casing 2, and the output end of the motor 14 is connected to the threaded rod 12 through a coupling.

[0025] The motor 14 drives the threaded rod 12 to rotate, and under the limiting action of the housing 2 and the opening 5, a pair of sealing plates 6 move simultaneously.

[0026] Among them, the top of the main body 1 of the ring network cabinet is equipped with a fire extinguishing mechanism 15.

[0027] The fire extinguishing mechanism 15 can use dry fire extinguishing methods such as thermal expansion glass and metal extinguishing agents, or it can use an external water spray source, which is the same as existing technology.

[0028] Among them, a number of observation windows 16 are installed on one side of the main body 1 of the ring main unit for observing the internal situation of the main body 1 of the ring main unit.

[0029] The working principle of this embodiment is as follows: When using the explosion-proof ring main unit, the operator first installs the main body 1 of the ring main unit into a suitable position and installs each electrical component into a suitable position. After installation, the air pump 4 is turned on. The air pump 4 continuously discharges the air inside the main body 1 of the ring main unit, thereby improving the air circulation inside the main body 1 of the ring main unit in conjunction with the ventilation opening 8. The temperature sensor 7 inside the chassis 2 can detect the temperature at different locations inside the main body 1 of the ring main unit in real time. When an abnormally high temperature is detected at some locations, the motor 14 is turned on and drives the threaded rod 12 to rotate. Under the limiting action of the chassis 2 and the opening 5, a pair of sealing plates 6 move simultaneously, so that the sealing plates 6 block the ventilation openings 8 on both sides of the main body 1 of the ring main unit. At the same time, the air pump 4 continues to be turned on for a period of time to discharge the gas inside the main body 1 of the ring main unit, reduce the oxygen content, and then turn off, thereby reducing the probability of further hazards.

[0030] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A ring main unit with explosion-proof function, comprising a ring main unit body (1), characterized in that: A chassis (2) is installed on one side of the main body (1) of the ring main unit. Several air inlets (3) are installed inside the chassis (2) on the side near the main body (1) of the ring main unit, and one end of the air inlet (3) extends into the interior of the main body (1) of the ring main unit. An air pump (4) is installed at the top of the interior of the chassis (2) by a bracket. The input end of the air pump (4) is connected to several air inlets (3) through a connecting pipe. The output end of the air pump (4) extends to the outside of the chassis (2). A pair of openings (5) are provided on the edge of the chassis (2) near the main body (1) of the ring main unit, and the openings (5) penetrate the side of the main body (1) of the ring main unit near the chassis (2). Inside the chassis (2), a pair of sealing plates (6) matching the size of the opening (5) are slidably installed on both sides of the chassis (2) at a position parallel to the opening (5), and the pair of sealing plates (6) are respectively in close contact with the two sides of the ring main body (1). A drive assembly is installed at the bottom of the chassis (2). Several temperature sensors (7) are installed inside the chassis (2) on the side near the ring main body (1). Several ventilation openings (8) are provided on the side near the pair of sealing plates (6). Several installation chambers (9) and electrical racks (10) are provided inside the ring main body (1). A cable inlet hole (11) is provided on one side of the bottom of the ring main body (1).

2. The ring main unit with explosion-proof function as described in claim 1, characterized in that: The drive assembly includes a threaded rod (12), which is rotatably mounted at the bottom of the housing (2) via a bearing seat. A connecting plate (13) is threadedly connected to the circumference of the threaded rod (12), and the connecting plate (13) is connected to a pair of sealing plates (6) respectively.

3. The ring main unit with explosion-proof function as described in claim 2, characterized in that: A motor (14) is installed on one side of the bottom of the chassis (2), and the output end of the motor (14) is connected to the threaded rod (12) via a coupling.

4. The ring main unit with explosion-proof function as described in claim 1, characterized in that: The top of the main body (1) of the ring network cabinet is equipped with a fire extinguishing mechanism (15).

5. The ring main unit with explosion-proof function as described in claim 1, characterized in that: Several observation windows (16) are installed on one side of the main body (1) of the ring main unit.

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